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About: Kornerupine     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatAluminiumMinerals, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: Thingdul:ChemicalObjectchemical substanceyago:WikicatBorateMineralsMineralmineralyago:WikicatMagnesiumMineralsyago:WikicatMineralsyago:WikicatOrthorhombicMineralsyago:WikicatSilicateMineralsyago:WikicatSilicatesyago:Abstraction100002137yago:Chemical114806838yago:Compound114818238yago:Material114580897yago:Matter100020827yago:Mineral114662574yago:Part113809207yago:PhysicalEntity100001930yago:Relation100031921yago:WikicatHydroxideMineralsyago:WikicatIronMineralsyago:Salt115010703yago:Silicate115040033yago:Substance100019613yago:WikicatAluminiumMinerals New Facet based on Instances of this Class

Kornerupine (also called Prismatine) is a rare boro-silicate mineral with the chemical formula (Mg,Fe2+)4(Al,Fe3+)6(SiO4,BO4)5(O,OH)2. It crystallizes in the orthorhombic - dipyramidal crystal system as brown, green, yellow to colorless slender tourmaline like prisms or in massive fibrous forms. It has a Mohs hardness of 7 and a specific gravity of 3.3 to 3.34. Its indices of refraction are nα=1.660 - 1.671, nβ=1.673 - 1.683 and nγ=1.674 - 1.684. Deposits are found in Burma (Myanmar), Canada (Quebec), Kenya, Madagascar, Sri Lanka, Tanzania, and South Africa.